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. Author manuscript; available in PMC: 2023 Jun 30.
Published in final edited form as: Water Res. 2022 Apr 9;218:118443. doi: 10.1016/j.watres.2022.118443

Table 2.

The three optimal random forest models, as selected by the exhaustive search algorithm. Models A, B, and C had the highest out-of-bag (OOB) accuracy for cluster 3, 2, and 1, respectively.

Model Model form OOB accuracy, percent
Overall Clusterl Cluster2 Cluster3
A Class ~ Natural_pct + Fertilizer_MK + ValleyRidge_pct + Deposition_MK + Carb_pct 70.5 66.7 68.8 76.0
B Class ~ AgSurplus_MK + Fertilizer_MK + Deposition_MK + Natural_pct 70.5 66.7 75.0 68.0
C Class ~ BlueRidge_pct + Deposition_MK + Coastal_pct + Crop_pct + Fertilizer_MK + Natural_pct 69.2 81.0 65.6 64.0